AZ 1734 then FR 4437 at Fiumicino
Catania → Rome → Riga
Timetable, Rome time
15:35AZ 1734 from Catania at the gate
06:00FR 4437 to Riga leaves the gate
14 h 25 apart on the timetable, overnight
FR 4437 leaves 14 h 25 after AZ 1734 arrives on the timetable: more than half a day, so not a connection we count.